Bathtub



FIG. 1 is top plan view of a bathtub;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a front-top-left side perspective view thereof;

FIG. 5 is a rear-top-right side perspective view thereof;

FIG. 6 is another front-top-left side perspective view thereof;

FIG. 7 is a top-left side perspective view thereof; and,

FIG. 8 is a rear-top-left side perspective view thereof. 

CLAIM The ornamental design for a bathtub, as shown and described. 